Resonator



FIG. 1 is a top, perspective view of a resonator showing our new design;

FIG. 2 is a bottom, perspective view thereof; and,

FIG. 3 is a top, plan view thereof.

The broken lines showing frame members and supports are illustrative and form no part of the claimed design. The broken lines showing the edge of the mesh material represent boundaries of the claimed design and form no part of the claimed design. 

The ornamental design for a resonator, as shown and described. 